The next version of RTTOV (version 13) will be released in September 2020. We are now inviting beta testers to get an early release of the code to test in their particular applications and provide feedback to the NWP SAF. The beta test version is due for release in late March 2020 and feedback will be needed by the end of May 2020. If you are interested in this opportunity please contact the NWP SAF helpdesk, or email us at admin@nwp-saf.eumetsat.int and we will give you instructions on how to download the beta release around 1st April 2020.